Method of and means for waxing tin plate



May23, 1939. f w. E. sumas 2,159,351

' uETHooF AND mms Fon wAxING TINrLA'rE.

'nieddm 1s, 1937 5 Sheets-Sheet l n NH23, 1939- 1 w.,E. BURNS 2,159,351-

IIETHOD OF AND IEANS FOR WAXING T IN PLATE En "1 18' 1937 s sheets-sheet 2 May 2 3 1939- w. E. BURNS 2,159,351

`METHOD OF' AND MEANS FOR WAXING TIN PLTE Filled Jan. 18. 1937` 3 Sheets-Sheet 3 'ATTORNEYS INVEN 0R.' h//LfoeoBue/v Y 4o involved the Passing 0f the Plates 0f tin against Fig. 6 is a cross section on line 6 4. 40

45 ever, has not`been'entire1y satisfactory for the 9 is a cross section of the vapor delivery 45 50 ineffective application.

May 23,'.1-939 I l v y 2,1

UNITED sTATEsPATENT oFFlcE.r

METHOD OF'AND MEANS FOR yWAXING TIN PLATE Wilford E. Burns,'Burlingame. Calif., assigner to M. J. B. Company, San Francisco, Calif., a. corporation of Delaware v Application January 18, 1937, lSerial No.121,153

' 4 claims. (o1. 91-1o) This invention relates to a method of and expense and whereby it is insured that every means for applying wax, or the like, toI sheet' part of a plate will receive the wax iilm to a metal plates, and it has reference in particular desired extent.

to the application of a film of .wax or other lu- More specifically, the present invention resides 5 bricant to tin plate as kused in the manufacture in the provision of means whereby the wax may 5 of cans. be vaporlzed and applied to the tin plate in the In the manufacture of tin cans by presentform of-vapor, and other meansfor expediting day methods and machines; it is the general the condensation of the wax vapor on the surpractise to prepare the body blanks and the ends faces of the tin plate. I 0f the cans from sheets of tin plate, first by cut- It is also an object of the invention to provide l0 ting the plates into pieces or blanks of a remechanical means for conveying the plates bequired size and then forming the body blank into reath a lubricating vapor delivery nozzle, and bodies, and stamping the ends from otherl pieces. other means for effecting a forced ow of heated Later, the ends and bodies are assembled to air across the'vap'or producing vat and into thecomplete the cans. The body blanks, generally, nozzlein a manner whereby the vapor iscarried l are rolled or bent into body form and are usuin suspension on the hot air and is directed ally cylindrical,l While the ends, which are to be `against the surfaces of the cooled plates for conapplied to the open ends of the bodies, are die densation thereon. formed.. In a great many instances, the metal Other objects of the invention reside in the forming the ends is drawn to a considerable various details of construction and in' the combi- 20 extent in the formation of special shapes, flanges vnation of parts, and in the mode of operation as or in the formation ofstiffening or strengthen- .will hereinafter be more fully described. ing ribs and corrugations generally to be found In accomplishing these and other objects of in can ends. y the invention, I have provided the improved deg5. Particularly by reason of the die-forming of tails of construction, the preferred forms of 25 the blanks, it is extremely desirable that the tin which are illustrated in the accompanying drawplate be treated with a lubricant to facilitate the `ings wherein-v drawing operation in the dies without danger of Fig. 1 is a side view of a wax applying machine cracking or rupturing the metal, and it is most embodied by the present invention. convenient that this lubricant be applied to the Fig. 2 is a plan or top view of the same. 30

plates while they are in the large sheet form. Fig. 3 is an end elevation of the machine. Therefore, it has been the general' practice to Fig.'4 is a cross sectional view on the line 4-4 apply a coat or illm of wax or oil -to the large in Fig. 2, particularly illustrating the wax vaporsheet plates prior to their being cut into the izing vat, the vapor delivery header or nozzle blanks'or smaller pieces for delivery to the body and the -air circulating fan and pipe connections. 35

f makers or end presses, but heretofore the most. Fig. 5 is a longitudinal section of the machine common method of applying the wax or oil has illustrating the means of conveyance for the tin been by'use of brushes, either hand or mechani-f vplate and the location of the'wax vat and vapor cally operated. One of the mostA common means applying head.

revolving brushes which were also incontact Fig. 7A is a crossl sectional view of the end dewith' cakes of wax; the arrangement being such livery rollers taken on line 'I-'l in'Fig'. 1. that the brush first contacted the'lubricant and Fig. 8 'is a plan view of the driving mechathenthe plate. This' means or method, hownim:

reason that itis impossible to 'evenly apply the nole, on the line S-l in Fig. 2. wax or oil to the when handoperation Briefly describing the machine, it comprises of brushes has been employed, this was not sata horizontal.- chain belt conveyer mechanism isfactory because ot excessive expense as weil as whereby sheet metal plates may be conveyed, one

. Y at a time, from the receiving to the delivery end 50 In view of the above, it has bem the principal of the machine. The conveyer is arranged to object of this invention to provide a method'of support the sheets ot tin plate horizontally so and means 'a thin nlm of ywax or oil that, in theiry conveyance, they will be carried maybeevmlyanddleeth'elyappliedinaneeobene^havapordischargehdornoulefrom u puedan mue-at very man 'which .nx or other lubricating vapor is denvand facilitate the condensation of the lubricating vapor as it is delivered against theirupper surfaces. Also located beneath the conveyer is a vat in which the lubricant is retained in melted condition by an application of. heated airso that there will be a steady rise of vapor from the vat.

A blower operates to deliver, the heated air against the bottom of the vat as a means of heating the latter, and the heated air is then directed across the-top of the vat to pick up the vapor and to carry it in suspension into the delivery nozzle housing from which it is discharged with the not air through small perforations,

against the metal sheets. The wax vapor is thus applied to the sheets shortly after they enter the .machine and they are then carried through a suitable cooling interval before being delivered from the machine onto a stack. If it is desired, vapor delivery nozzles may be located both above and below the conveyer for an application Aof wax to both sides thereof. Y

Referring more .in detail to the drawings- The frame structure of the machine comprises parallel, opposite side beams i-I', joined in spaced relation by cross beams 2. Legs 3 supportthe structure and these. are braced -in a suitable manner by the connecting and brace bars 4. Across one end of the frame is a horizontal plate 5 that is supported on the beams i-i and serves as axtable for the support of a stack of sheets of tin plate, as'designated at 6 inV Figs. 1

and 2. vAt opposite ends of the frame, respectively, are cross shafts 8 and 9 on which on'which are xed sprocket wheels I0 for the driving and carrying of four endless conveyerchain belts i I. These are in parallel, spaced relation, with their ably driven to effect the desired ltravel of the four Y bevel gear 2i fixed on cross shaft 9.

conveyer belts, and the driving means, as shown best in Figs. 2, 7 and 8, comprises a shaft ,Hextending longitudinally of the frame and ro'tatably supported from the beam I' by bearing brackets i9i9. On one'end of the shaft I1 is fixed a bevel gear 29 in driving mesh with a Rotatably supported below shaft i1',.parallel thereto and rotatably supported in bearings 22 and23, is a shaft 24. v This latter shaft is driven through a y belt connection 25 with an electric motor`29, and

' shafts I1 and 24 are operatively connected by a belt' 21 operating about belt wheels and 29 fixed on .the shafts respectively. The ratio of belt wheels and Agearing lssuch as to provide the desired speed of travel for the belts 4.

In operation, the operator feeds thesheets of :tin successively from the stack onto the traveling belts 4, so that they .are conveyed thereon at spaced intervals from the receiving to the delivery end of the machine. Through the latter half of' eral .conveyer belts,-is an open top vat 35,' as shown best in Figs. 4 and 5. 'I'his vat is enclosed in a housing 36, which provides air chambers or passageways 31 and 38,' respectively, below and above the vat. These passageways are connected -at one side of .thevat by an air vpassage 39, as shown in Fig. 4, and at the opposite side of the vat the passageway 31 has a connecting pipe l-4il leading to a blower housing 4| while the passageway v38 has a connecting pipe 42' leading to a nozzle header 43 disposed' transversely of the machlnedirectly above the conveyer chains. The nozzle header is provided with a bottom plate 43a parallel with and closely above the plane of- 'travel of the tin plates on the conveyer chains, and it is provided with closely placed, smallperforations 4 4, as noted in Figs. 4 and 9. A blower -fan 45 is mounted for operation in the housing 4i and in operation it drives intaken air through pipe 40 into passageway 38 below the vat, thence through-the connecting conduit 39 into the chaminto header 43.

It will here bevmentioned that a supply of wax or-oil is placed in the vat 35 and also that suitable burners or air heaters', as designatedat 5I in Fig. 6, a're located in .the air inlet pipe 50 of the blower housing 4| so that all intaken air is heated. This heated air thenVv operates, in

ber 31 above the vat, thence through conduit 42 housing 36, to heat oil or melt the wax and cause the desired vaporization thereof. Thev vapor rises from the vat as steam and is picked up a'nd conducted by the stream of hot air into the nozzle header from which it is discharged with the air in ne jets directly against the top surfaces of the tin plate sheets as they pass beneath the nozzle.

It will here be'stated that in the present machine, it has been found most practical to maintain' the melted waxat a temperature of approximately 400 F. This will be maintained by the delivery air, heated to a necessary tempera' ture, below and across the top of illustrated in Fig. 4.

In order that the ,wax or oil vapor may be readily condensed on the plates, I have provided a blower 99 located beneath the receiving end of the machine and operated by a motor 6I to deliver cool air intoa cross header 62' from which the vat as one or more nozzles 53 direct it against the under sides of the tin sheets as they are passing beheath the nozzle. -This cooling of the plates causes a ready condensation of the wax or oil.

.. plete'lypassed through the rolls,' and will then fall.- flat instead of edgewa'ys.4 These rollers are rbtatabiy driven by means shown in Figs. 1 and 2, wherein 19 and 1I designate intermeshing gears l which are fixed respectively to the supporting shafts'l! and 13 of the rollers and a chain belt 1I operates about a sprocket wheel 19-on the d1 'i ven shaft 9'and on the supporting shaft 13 of the lower roller.

With the machine so constructed.' sheets of tin plate may be quickly passed through the m'achine and a--wax `or oil film applied thereto to'- any extent desired, depending upon speed of ,l heat and air delivery, and vevery '.ffaces in the saine plate will be evenly and eectively coated."

.It it should be desired to apply a coat ofV wax or oil to both sides of the. tin sheets, it is.onlyv 'lo Having thus descnbedlmy invention, what r claim as new therein, and

d esire to secure by LettersPatent, isv 4 1.. The method-of applying a vlubricating illm whichcomprises Aconveying the sheets of tin plate through :ai treating station and then through a cooling vxinterval, creating lubricating vapor within an enclosure, causing a streamv of hot air to be directed through-the'enclosure, thereby t'o be charged with the vapor, and then against the plate surface to be treated while the sheet is passing throughthe treating station, and causingscooling air to be directed against the surface 'of the sheet opposite that being treated.

2. 'me method or applying ys. lubricating nlm to 5 thesurta of a tin plate sheet, comprising-con- -zation of the lubricant, and the charging of the air` stream with the vapor, then directing the charged air stream from the enclosure to a nozzle whereby it is discharged evenly over the entire surface of the plate, causing a cooling air stream to be directed against the surface of the plate opposite that being treated, and then conveying the sheet through a cooling interval.

3. The method of .applying alubricating illm to metal sheets which comprises heating a lubricant to cause it to yaporize and creating a flow of air whereby to carry the vapor in suspension in the air against the sheets of metal for condensation thereon. I

4. The .method ot applying a lubricating lm to metal sheets which comprises heating a lubricant to cause-it to vaporize and creating a flow of air whereby to carry the' vapor in suspension in the air against the sheets of metal for condensation thereon, and directing a coolingcurrent of air l ,i aiainst the sheets to facilitate condensation. veying the sheet 'through a treating station and A l vWllIiFOIIFtD E. 

